What is the number one reason for divorce?

According to research by Corporate Legal Services, as of October 2013, the leading cause of divorce is unreasonable behavior. Unreasonable behaviors can range from a husband making his wife feel bad for going out with her friends or a spouse spending all of the money in a joint savings account.

In the 1970s, unreasonable behavior only made up approximately 28 percent of all divorce cases. In 2013, that number had risen to approximately 47 percent. According to the same study, only 15 percent of all couples divorce over infidelity now as opposed to 29 percent of couples in the 1970s.